Improvements door-springs



1.1. BISEL. Bohr-Springs.

N0,l47,892 Patented Feb. 24,1874.

ways.

UNITED STATES ATENT OFFICE.

JOSEPH J. BISEL, OF MONTANDON, PENNSYLVANIA.

IMPROVEMENT IN DOOR-SPRINGS.

Speoication forming part ofLetters Patent No. 147,892, dated February 24,1874; application filed February 12, 1874.

nying drawings, and to the letters of reference marked thereon, which form a part of this speciication.

The nature of my invention consists in the construction and arrangement of a door-spring in such a manner that the tension otl the spring can be easily regulated, and the door readily releasedirom the action of the spring when desired, as willgbe hereinafter more fully set forth.

In order to enable others skilled in the art to which my invention appertains to make and use the saine, I will now proceed to describe its construction and operation, referring to the annexed drawings, in which- Figure 1 is a front view of a door and doorframe with my spring arranged on the same. Fig. 2 is a transverse vertical section of the same through the line .r x, Fig. l; and Fig. 3 is a plan view of the same.

A represents a door-frame, with a door, B, hinged thereto in any of the known and usual To the door-frame A, above the door and near the inner edge of the same, is secured a plate, O, from which projects a rod, D, provided with screw-tlireads for a suitable distance inward from its outer end. The rod D is curved at its inner end from the plate O toward the inner edge of the door, and then cxtends straight on a line parallel with the door when closed. Upon the rod D, nearest to the plate O, is placed a short bar or plate, a., which has an elongated slot to pass over the rod, and is at its outer end provided with a pin, x, to be inserted in a hole in the door B, as shown in Fig. 2, and the bar a held in this place by means of a button, b, pivoted to the door and turned over the end of said bar. Next to the bar a, on the rod D, is placed a washer, e, and then a spiral spring, d, after which a knob or head, h, is screwed on the end of the rod to hold the spring d against the bar a.

When the door is being opened, after the parts have been arranged in the manner just described, the plate or bar a will move with the door, and its upper end slide upon the rod, so as to compress the spring against the knob IL, and as soon as the pressure is removed from the door, the spring will expand and close the door.

The tension 'of the spring d is easily regulated by simply turning the knob lr out or in upon the rod D.

By turning the button b to one side, the plateor bar a may be turned at an angle on the rod D by means of the elongated slot in its upper end, so that the pin x, upon its lower end may slip out of the hole in the door, and the bar a be then turned to one side, as shown by dotted lines in Fig. l, thereby releasing the door from the action of the spring, and allowing it to be opened clear back to the wall and remain so, if desired.

The tension of the spring d may be further regulated by inserting a pin, f, through any of the coils of the spring, and through a hole, t', in the rod D.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination, with a door-frame, A, and door B, of the plate G, rod D, spring d, screwknob h., and a plate or bar, a, placed upon the rod and connected to the door, all substantially as and for the purposes herein set forth.

2. The combination, with the rod D and spring d, ofthe plate or bar a, provided with an elongated slot at its upper end, and the pin at its lower end, and the pivoted button b, all substantially as and for the purposes herein set forth.

In testimony that I claim the foregoing as my own I aiiix my signature in presence of two witnesses.

JOSEPH J. BISEL.

Vitncsses:

S. P. FANsoLD, M. J. INeLnR. 

